102 NEOTROPICAL PSELAPHIDAE 



Barroeuplectoides zeteki new species 



Female Type. Measurements: head 0.17 x 0.24 mm.; pronotum 0.21 x 0.23 

 mm.; elytra 0.25 x 0.33 mm.; abdomen 0.34 x 0.33 mm.; antennae 0.25 mm.; 

 total length 0.97 mm.; greatest width 0.33 mm. (PI. XV). 



Reddish-brown, moderately shining; pubescence uniform in length (0.03 

 mm. long), sparse on head, pronotum and elytra, but moderately abundant on 

 tergites. 



Head transversely trapezoidal, widest through eyes; tempora slightly 

 convergent, long, almost twice as long as eyes. Eyes small, not prominent, 

 composed of about 24 very minute facets ; the eye almost circular from a lateral 

 view, and each facet being about the size of one of the coarse head punctures. 

 Occiput medianly, slightly sinuate, and with a feeble median notch. Vertex 

 with two small, circular, nude foveae on a line through the middle of the eyes, 

 each vertexal fovea being about twice as wide as one of the coarse head punc- 

 tures. From each vertexal fovea is a deep, slightly convergent longitudinal 

 sulcus which extends anteriorly to end in an anterior fovea as large as the 

 vertexal fovea. This anterior pair of foveae not united to each other by a 

 transverse arcuate sulcus. Surface of vertex between the longitudinal sulci 

 strongly vaulted into a subtriangular area which is not punctate, and this 

 impunctate condition continues anteriorly of the anterior pair of foveae to 

 the nearly straight, slightly elevated frontal line. Sides of vertex lateral to the 

 longitudinal sulci, from occiput to antennal prominences, coarsely and sub- 

 cribrately punctured. Therefore the vertex has four foveae, the normal posterior 

 pair and an anterior pair near the antennal prominences. Ventral surface of 

 head coarsely but sparsely punctate, convex; laterally limited by a strong, 

 short carina which extends each side from base of mandible to a point op- 

 posite the posterior margin of the eye, the lateral carina being parallel to, 

 but not diverging toward, the eye; a small basal circular nude gular fovea. 

 Ventral face of head without capitate setae; ventral surface of cervicum 

 polished, impunctate, with a well-defined median longitudinal stria extend- 

 ing from the gular fovea to prosternal margin. Front nearly vertical. 



Maxillary palpi very minute, slightly longer than the eye, presumably 

 four-segmented; second segment subtriangular; third subspherical, almost as 

 long and about the same width as second ; fourth wider than third and as long 

 as second and third united, ovate, medianly inflated, apically subacute. 



Antennae short and thick, eleven-segmented, rather widely separated at 

 base by the front, the separation equaling nearly one-half the width of the 

 head; segment I and II subquadrate, of same width and length; III to VIII 

 narrower than second, shorter than second, subquadrate, very closely articu- 

 lated; of approximate same length and width; IX subquadrate, very slightly 

 wider than eighth and about as long as eighth; club strongly formed of the 

 last two segments; X twice as wide and twice as long as ninth, nearly twice as 

 wide as long, transversely trapezoidal, with the apical half narrower so that 

 the eleventh segment is conspicuously articulated in distinction to the ap- 

 pressed articulation of the rest of the segments; XI peculiar in that it is as 



